Courtesy of Norton Museum of Art, West Palm Beach, Bequest of R. H. Norton, 53.5
Courtesy Hauser & Wirth Collection Services
Washington D. C., Smithsonian Institution, Hirshorn Museum and Sculpture Garden. Gift of the Joseph H. Hirshhorn Foundation, 1966. Foto: Lee Stalsworth
Städel Museum, Frankfurt am Main - U. Edelmann / ARTOTHEK